JBL SUB 140P/230 User Manual

Service Manual
SUB 140P / 230
Active 8” Subwoofer.
Weave design, Studio Series.
CONTENTS
PCB DRAWINGS 12
OWNER’S MANUAL 2
WIRING DIAGRAM 23
SPECIFICATIONS 5
BLOCK DIAGRAM 24
PACKAGE DRAWING 6
SCHEMATIC DIAGRAMS 25-28
EXPLODED VIEW AND PARTS 7
PARTS LIST 8
Released EU2011 Harman Consumer Group, Inc. Rev 0, 03/2011
8500 Balboa Boulevard
Northridge, California 91329

JBL SUB 140P/230 Specifications

General

Brand	JBL
Model	SUB 140P/230
Category	Subwoofer
Language	English

Summary

Subwoofer Rear Panel Controls and Connections

Rear Panel Controls Overview

Details the On/Standby LED, Crossover, Phase, Power-On Mode, and Level controls.

Rear Panel Connection Ports

Explains Line-Level In (LFE/L/R) connectors, Power Switch, and Power Cord.

Subwoofer Placement

Optimal Subwoofer Placement Guide

Guidance on positioning the subwoofer for best bass performance and integration.

Subwoofer Connection Methods

Connecting to Dedicated Subwoofer Output

Details connecting the subwoofer to a receiver with a dedicated LFE out.

Connecting with Preamp Outputs

Explains connecting the subwoofer to a receiver using preamp outputs.

Subwoofer Operation and Adjustment

Powering On and Off

Instructions for turning the subwoofer on, off, and using standby modes.

Crossover Frequency Adjustment

Setting the crossover frequency to blend subwoofer bass with satellite speakers.

Subwoofer Volume Level

Using the level control to set the subwoofer's output volume for optimal balance.

Phase Control Adjustment

Setting the phase switch for optimal bass impact and clarity with satellite speakers.

Subwoofer Technical Specifications

Key Specifications Overview

Lists essential technical details of the JBL subwoofer model.

Amplifier Schematic Diagram

Main Amplifier Circuit Schematic

Detailed schematic of the amplifier circuit, showing component interconnections and signal paths.

Electrical Block Diagram

Subwoofer System Block Diagram

Overview of the subwoofer's internal signal flow and component interactions.

Amplifier Schematic Diagram - Part 2

Amplifier Circuit Schematic - Continuation

Continuation of the amplifier schematic, detailing additional circuit sections and components.

Control Board Schematic Diagram

Control Board Circuit Schematic

Schematic diagram for the control board, illustrating its circuitry and components.

Stand-by Board Schematic Diagram

Stand-by Board Circuit Schematic

Schematic diagram for the stand-by power supply board, showing its circuitry.

Power Supply Board Schematic Diagram

Power Supply Board Circuit Schematic

Schematic diagram of the main power supply board, detailing its components and circuitry.